ROBINSON. — SPECIES OP MIMOSA. 329 



Var. glabrata, Benth. Stems, &c., merely puberuleut: leaflets 

 somewhat larger, green and glabrous, mucrouate as in the typical form. 



— Benth, 1. c. M. malacojjhylla, var. glabra, Gray in Torr. Bot. Mex. 

 Bound. 61 (name only). — On the lower Rio Grande, Sckott, Miss 

 Croft, and earlier at San Fernando, Tamaulipas, Berlandier, nos. 815, 

 2235. 



60. M. polyancistra, Benth. Climbing (?) glabrous shrub: 

 spines small, numerous, recurved : pinnae 3 to 7 pairs ; leaflets 6 to 8 

 pairs, oblique, obovate-oblong, mucronate. — Trans. Linn. Soc. xxx. 422. 



— " New Spain," Pavon. Description compiled. 



++ ++ Tawny-tomentose : leaflets oblong : spines on the upper part of the stem 



and peduncles not conspicuous. 



61. M. Ervendbergii, Gray. Pinnae about 5 pairs; petiole and 

 primary rhachis 1 dm. long, armed (as in related species) by numerous 

 short recurved spines; leaflets about 12 pairs, 7 to 10 mm. long, 3 mm. 

 broad, acutish at the apex, oblique at the base, discolorous, sordid-tomen- 

 tose beneath : heads numerous, paniculate ; peduncles 2 cm. long, un- 

 armed : fruit unknown. — Proc. Am. Acad. v. 178, in part. M. 

 costaricensis, Benth. Trans. Linn. Soc. xxx. 423, ex char. — Warten- 

 berg near Tantoyuca, Huasteca, Mexico, Ervendberg, no. 2 (herb. Gray) 

 in part. This species was founded upon mixed material and it is now 

 clear that the specimen to which Dr. Gray referred when he mentioned 

 the young leaves is M. invisa, H. & B. Bentham seems never to have 

 understood Dr. Gray's species, referring to it Schrankia elata, Mart. & 

 Gal. which from its armed peduncles cannot be the plant here retained 

 as M. Ervendbergii, nor from its arborescent habit is likely to have been 

 the other component of Dr. Gray's type. Furthermore Bentham also 

 described 31. costaricensis, which in all characters mentioned corresponds 

 accurately to M. Ervendbergii, as here interpreted. If, as is surmised, M, 

 costaricensis proves identical, the range of the species may be extended 

 to Costa Rica, where coll. by Oersted, and Guatemala, Salvin, ace. to 

 Hemsl. 



■^ I-*- -t-i- Loosely pubescent : leaflets linear to linear-oblong : upper part of the 

 stem and often peduncles covered with very numerous reflexed stramineous spines. 



62. M. invisa. Mart. Petioles rather long, copiously armed ; 

 piniiiB 4 to 8 pairs ; leaflets 12 to 25 pairs, 3 to 4 mm. long, 1 mm. 

 broad: heads in simple elongated terminal raceme; peduncles very short, 

 villous and often armed; heads rose-purple. — Herb. Fl. Bras. 121; 

 Benth. Trans. Linn. Soc. xxx. 436. M. diplotricha, Wright in Sauv. PL 

 Cub. 34, ace. to Benth. M. Ervendbergii, Gray, 1. c. in part. SchranJda 



